| Mendaro | |
| Settlement Type: | Municipality |
| Pushpin Map: | Spain Basque Country |
| Pushpin Map Caption: | Location of Mendaro within the Basque Country |
| Coordinates: | 43.2642°N -24.53°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Spain |
| Subdivision Type1: | Autonomous community |
| Subdivision Type2: | Province |
| Subdivision Type3: | Eskualdea |
| Subdivision Name2: | Gipuzkoa |
| Subdivision Name3: | Debabarrena |
| Established Title: | Founded |
| Established Date: | 1983 |
| Leader Title: | Mayor |
| Leader Name: | Sonia Garcia Raposo |
| Area Total Km2: | 25.39 |
| Elevation M: | 30 |
| Population Density Km2: | auto |
| Postal Code Type: | Postal code |
| Postal Code: | 20850 |
| Area Code Type: | Dialing code |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
Mendaro is a town and municipality located in the province of Gipuzkoa, in the Autonomous Community of Basque Country, northern Spain.
The Mendaro Valley is the town's namesake. There is little agreement on the origin or meaning of the word itself. Surrounded by mountains, the town is located in northeast Gipuzkoa near the Biscayan border.
Officially founded in 1983, Mendaro is considered one of Gipuzkoa's youngest municipalities.